Toamasina's 2026 population is now estimated at 578,889. In 1950, the population of Toamasina was 33,794. Toamasina has grown by 24,807 in the last year, which represents a 4.48% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects . These estimates represent the Urban agglomeration of Toamasina, which typically includes Toamasina's population in addition to adjacent suburban areas.
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Antananarivo | 4,413,150 | 4.35% |
| Antsirabe | 465,434 | 4.34% |